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Sanjay K JohnSK

Sanjay K John

Senior Software Engineer | Full Stack | FE Focused

€450/day
Cologne, DE
8-15 years

Average response time: 1 hour

About Sanjay

With over 8 years of experience, I am a Senior Frontend Developer who has worked across varied industries such as logistics, e-commerce, insurance, education, healthcare, and food delivery. My core expertise lies in web front-end technologies, but I also have exposure to backend and mobile app development, which gives me a well-rounded perspective on the entire development lifecycle. As a Senior Developer and Lead Developer, I’ve successfully led teams and handled multiple projects, delivering scalable, user-friendly solutions in dynamic fast-paced environments.
  • English

    Native or bilingual

  • German

    Basic

Can work on-site
Cologne (up to 50km)

Experience

  • JUMiNGO GmbH
    Lead Front-End Engineer
    February 2023 - Today (3 years and 4 months)
    Cologne, Germany
    Leading the Front-End team (4–6 developers) | Key contributor in defining team KPIs | Driving roadmap planning and execution | Performance optimization at scale | Migrated codebase from Vue 2 to Vue 3 | Introduced and implemented E2E testing framework | Deployed A/B testing infrastructure | Conducted R&D across multiple technical areas
    Vue(2/3), Quasar(1/2), JS, TS, Vite, Scss, Vuex, Pinia, Cypress, Jest, Strapi
  • Clark GmbH Frankfurt
    Front-End Engineer
    July 2022 - January 2023 (6 months)
    Hand, Aachen, NW, Germany
    Member of a special taskforce to resolve complex application issues | Developed features for both web and hybrid mobile apps | Refactored intricate UI modules for better maintainability | Practiced test-driven development for robust code quality
    Ember.js, JS, Ionic, Cordova, Capacitor, SCSS, Handlebars
  • BestDoc Technology Pvt. Ltd
    Senior Software Engineer
    December 2020 - July 2022 (1 year and 7 months)
    Kochi, Kerala, India
    Architected and developed the company's flagship product | Led a cross-functional team of frontend and backend developers | Built backend functionalities using Express.js | Oversawdesign and architecture across multiple company products
    Vue, Nuxt, Vuetify, Vuex, Express.js, Node.js, JS, SCSS, SQL, MJML, Selenium

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Education

  • Master of Computer Application
    MG UNIVERSITY
    2018
    Master of Computer Application
  • Bachelor of Computer Application
    MG UNIVERSITY
    2015
    Bachelor of Computer Application

Skill set

Categories